849
FZUS63 KMKX 150840
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
240 AM CST Sat Nov 15 2025

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON Lake Michigan.

Waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.SYNOPSIS...

Breezy southwesterly winds early this morning will become more
northwesterly as a secondary low pressure around 29.3 inches treks
across Lake Superior and northern Lake Michigan through the
morning. This will drag a cold front across the lake into the
afternoon along with stronger northwesterly winds shift into this
evening and continuing into Sunday. Expecting winds gusts around
30 kt with a few gale force gusts possible in the northern third
of the open waters as well as along the eastern lakeshore area
during this timeframe. Still do not have high enough confidence
for gusts exceeding 34 knots for extended period, thus will
continue to hold off on gale headlines at this time. Then winds
begin to ease as high pressure around 30.1 inches builds into the
Upper Midwest Sunday night through Monday. Another low pressure is
expected to track from the Central Plains to south of Lake
Michigan through midweek.

LMZ261-362-364-563-151615-
Lake Michigan from Seul Choix Point to Rock Island Passage 5 NM
offshore to Mid Lake-
Lake Michigan South of a line from Seul Choix Point to the
Mackinac Bridge and north of a line from Charlevoix MI to South
Fox Island 5 NM offshore-
Lake Michigan from Charlevoix to Point Betsie MI 5 NM offshore to
Mid Lake-
Lake Michigan from Rock Island Passage to Sturgeon Bay WI-
240 AM CST Sat Nov 15 2025

STURGEON BAY WI TO POINT BETSIE MI NORTH...

.TODAY...Southwest winds 15 to 25 kt becoming west late this
morning, then becoming northwest to 30 kt early this afternoon
increasing to gales to 35 kt late. Chance of rain this morning,
then slight chance of rain this afternoon. Waves 4 to 6 ft
occasionally to 8 ft building to 4 to 7 ft occasionally to 9 ft.
.TONIGHT...Northwest gales to 35 kt. Chance of rain in the
evening, then chance of rain and snow overnight. Waves 6 to 9 ft
occasionally to 12 ft.
.SUNDAY...Northwest gales to 35 kt. Chance of snow. Waves 6 to
9 ft occasionally to 12 ft subsiding to 5 to 8 ft occasionally to
10 ft.
.SUNDAY NIGHT...Northwest gales to 35 kt diminishing to 30 kt.
Chance of snow in the evening. Waves 5 to 8 ft occasionally to
10 ft subsiding to 4 to 6 ft occasionally to 8 ft.
.MONDAY...Northwest winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 3 to 5 ft subsiding to 2 to 4 ft.
.MONDAY NIGHT...Northwest winds 10 to 20 kt becoming north 5 to
10 kt. Waves 1 to 3 ft subsiding to 1 to 2 ft.
.TUESDAY...North winds 5 to 10 kt becoming northeast 10 to 15 kt.
Waves 1 ft or less.
.WEDNESDAY...Southeast winds 10 to 15 kt becoming south. Waves
1 ft or less.

$$

LMZ366-565-567-868-151615-
Lake Michigan from Point Betsie to Manistee MI 5 NM offshore to
Mid Lake-
Lake Michigan from Sturgeon Bay to Two Rivers WI 5 NM offshore to
Mid Lake-
Lake Michigan from Two Rivers to Sheboygan WI 5 NM offshore to
Mid Lake-
Lake Michigan from Pentwater to Manistee MI 5 NM offshore to Mid
Lake-
240 AM CST Sat Nov 15 2025

STURGEON BAY WI TO POINT BETSIE MI SOUTH TO SHEBOYGAN WI TO
PENTWATER MI...

.TODAY...Southwest winds 15 to 25 kt veering to northwest to
30 kt. Slight chance of rain this morning. Waves 4 to 6 ft
occasionally to 8 ft.
.TONIGHT...Northwest winds to 30 kt. Waves 7 to 10 ft
occasionally to 13 ft.
.SUNDAY...Northwest winds to 30 kt. Waves 7 to 10 ft occasionally
to 13 ft.
.SUNDAY NIGHT...Northwest winds to 30 kt diminishing to 15 to
25 kt. Waves 5 to 8 ft occasionally to 10 ft.
.MONDAY...Northwest winds 10 to 20 kt. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft.
.MONDAY NIGHT...Northwest winds 5 to 10 kt becoming north. Waves
1 to 2 ft.
.TUESDAY...Northeast winds 10 to 15 kt. Waves 1 to 3 ft.
.WEDNESDAY...Southeast winds 5 to 10 kt. Waves 1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-151615-
Lake Michigan from Michigan City IN to St. Joseph MI 5 NM
offshore to Mid Lake-
Lake Michigan from Sheboygan to Port Washington WI 5 NM offshore
to Mid Lake-
Lake Michigan from Port Washington to North Point Light WI 5 NM
offshore to Mid Lake-
Lake Michigan from North Point Light to Wind Point WI 5 NM
offshore to Mid Lake-
Lake Michigan from Wind Point WI to Winthrop Harbor IL 5 NM
offshore to Mid Lake-
Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5 NM
offshore to Mid Lake-
Lake Michigan from Wilmette Harbor IL to Michigan City IN 5 NM
offshore to Mid Lake-
Lake Michigan from Whitehall to Pentwater MI 5 NM offshore to Mid
Lake-
Lake Michigan from Grand Haven to Whitehall MI 5 NM offshore to
Mid Lake-
Lake Michigan from Holland to Grand Haven MI 5 NM offshore to Mid
Lake-
Lake Michigan from South Haven to Holland MI 5 NM offshore to Mid
Lake-
Lake Michigan from St. Joseph to South Haven MI 5 NM offshore to
Mid Lake-
240 AM CST Sat Nov 15 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Southwest winds to 30 kt veering to northwest 15 to
25 kt. Slight chance of rain. Waves 4 to 7 ft occasionally to
9 ft subsiding to 4 to 6 ft occasionally to 8 ft.
.TONIGHT...Northwest winds to 30 kt. Waves 4 to 7 ft occasionally
to 9 ft building to 10 to 14 ft occasionally to 18 ft.
.SUNDAY...Northwest winds to 30 kt. Waves 10 to 14 ft
occasionally to 18 ft subsiding to 8 to 12 ft occasionally to
16 ft.
.SUNDAY NIGHT...Northwest winds to 30 kt diminishing to 15 to
25 kt. Waves 8 to 11 ft occasionally to 14 ft subsiding to 7 to
10 ft occasionally to 13 ft.
.MONDAY...Northwest winds 10 to 20 kt diminishing to 10 to 15 kt.
Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft.
.MONDAY NIGHT...Northeast winds 5 to 10 kt veering to east 10 to
20 kt. Chance of rain. Waves 1 to 3 ft.
.TUESDAY...East winds 10 to 20 kt. Chance of rain. Waves 3 to
5 ft.
.WEDNESDAY...East winds 10 to 15 kt becoming southeast. Waves
1 to 3 ft.

$$

LMZ761-151615-
MAFOR 1511/
MICHIGAN NORTH 11430 11530 11740 14750 11750. A chance of rain
this evening, then a chance of snow overnight. Waves 3 to 6 feet
today. Waves 4 to 7 feet building to 6 to 9 feet tonight.

MICHIGAN SOUTH 12540 11630 11730 14740. Waves 3 to 6 feet
building to 4 to 7 feet, then subsiding to 3 to 6 feet today.
Waves 4 to 7 feet building to 9 to 12 feet tonight.

$$


Wagner

Experimental modernized open lake forecast is available online at
weather.gov/mkx/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes